/*
電子元件：DHT22
功能：偵測環境溫度、濕度
*/

#include "DHTesp.h"           // 使用 DHT sensor library for ESPx 函式庫

const int DHT_PIN = 32;       // DHT22腳位 // 32、33、34、35為佳

DHTesp dhtSensor;

void setup() {
  Serial.begin(115200);
  dhtSensor.setup(DHT_PIN, DHTesp::DHT22);    // DHT22
  //dhtSensor.setup(DHT_PIN, DHTesp::DHT11);  // DHT11
}

void loop() {
  // 讀取溫度和濕度資料
  TempAndHumidity data = dhtSensor.getTempAndHumidity();            
  // 判斷是否有正確讀取
  if(dhtSensor.getStatus() != 0){
    Serial.println("DHT sensor error status: " + String(dhtSensor.getStatusString()));   // 回傳是 timeout 或是 checksum 錯誤 
  }else if (isnan(data.humidity) || isnan(data.temperature)){
    Serial.println("Data is NaN!");
  }else{
    Serial.println("Temperature : " + String(data.temperature, 2) + " °C");   // 參考語法 String(val, decimalPlaces)
    Serial.println("Humidity    : " + String(data.humidity, 2) + " %");
    Serial.println("------------------");
  }
  delay(2000);
}